Rosh Review Questions Study Guide Rated A+

What is a subdural hygroma? {Ans: A collection of clear, xanthochromic blood-tinged fluid in the dural space.}characteristic presentation of subdural hematoma on head CT {Ans: collection of hyperdense blood in a crescent-shaped pattern conforming to the convexity of the hemisphere and often extending past cranial sutures}What is the treatment for a hemodynamically unstable child with supraventricular tachycardia? {Ans: Cardioversion at 0.5 to 1 J/kg. If unsuccessful, increase energy dose to 2 J/kg on subsequent attempts.}What is the upper limit of normal diameter for the different segments of bowel? {Ans: Small bowel (3 cm), colon (6 cm), cecum (9 cm)—the 3/6/9 rule.}What is Babinski's sign? {Ans: Dorsiflexion of the great toe and fanning of the other toes when the sole is stimulated.}Ottawa Ankle Rules A foot radiograph {Ans: pain in the midfoot region with any of the following: 1. bone tenderness at navicular bone 2. bone tenderness at the base of the fifth metatarsal 3. inability to bear weight for at least 4 steps both immediately after injury and at the time of evaluation}